mm2:
  mm2: 1
  cm2: 1e-2
  m2: 1e-6
  in2: 0.00155
  ft2: 0.000011
  yd2: 0.000001
cm2:
  mm2: 1e2
  cm2: 1
  m2: 1e-4
  in2: 0.155
  ft2: 0.001076
  yd2: 0.00012
m2:
  mm2: 1e6
  cm2: 1e4
  m2: 1
  in2: 1550.003
  ft2: 10.76391
  yd2: 1.19599
in2:
  mm2: 645.16
  cm2: 6.4516
  m2: 0.000645
  in2: 1
  ft2: 0.006944
  yd2: 0.000772
ft2:
  mm2: 92903
  cm2: 929.0304
  m2: 0.092903
  in2: 144
  ft2: 1
  yd2: 0.111111
yd2:
  mm2: 836127
  cm2: 8361.274
  m2: 0.836127
  in2: 1296
  ft2: 9
  yd2: 1